Y=9x+50
50 is what he dad gave him that doesn’t change, we know he works and earns $9 but we don’t know how many hours
You need to graph it?
5x - 2y = 7
you need two points to graph a line
make x = 0
5(0) - 2y = 7
-2y = 7
/-2 /-2
y = 7/-2 (0, -7/2)
make y = 0
5x - 2(0) = 7
5x = 7
/7 /7
x = 7/5 (7/5, 0)
make those points and join them
First of all to make our equation simpler, we'll equal
to a variable like 'a'.
So,
Now let's plug
's value (a) into the equation.
Now we turned our equation into a quadratic equation.
(The variable 'a' will have a solution set of two solutions, but 'x' , which is the variable of our first equation will have a solution set of four solutions since it is a quartic equation (<span>fourth-degree <span>equation) )
Let's solve for a.
The formula used to solve quadratic equations ;
The formula is used in an equation formed like this :
</span></span>
In our equation,
t=16 , b=-41 and c=25
Let's plug the values in the formula to solve.
So the solution set :
We found a's value.
Remember,
So after we found a's solution set, that means.
and
We'll also solve this equations to find x's solution set :)
So the values x has are :
,
,
and
Solution set :
I hope this was clear enough. If not please ask :)
2 gal 3 qt 1 pt + 4 gal 1 qt = 6 gal 4 qt 1 pt
6 gal 4 qt 1 pt is your answer
hope this helps
The answer is C: multiply by 2